Machine for beveling edges of buttonholes



w. 1. BRENNAN. MACHINE FR` BEVELING EDGES 0F BUTTONHOLES.

APPLICATION FILED MAR. 2l. 1919. v

1,427,780. Patented Sept. 5, l922.

hole.'

Patented i Sept. 5, 1922.

omiso srArEs ATENT ortica.

WILLIAM J'. BRENNAN, OF SVVAMPSCOTT, MASSACHUSETTS, ASSIGNOR `rTO UNITED SHOE MACHINERY CORPORATION, OF RATER-SON, vN'EW JERSEY, A CORPORATION or New .TER-snr.

MACHINE FOR BEVELING EDGES OF BUTTONHOLES.

Application viled March 21,

To all whom t may concern.'

Be it known that I, VILLIAM J. BRENNAN,

a citizen of the United States, residing at Swampscott, in the county of Essex and `State of Massachusetts, have invented lcertain Improvements inMachines for Beveling Edges of Buttonholes, of which the foly lowing description, in connectionv with the and `is herein illustrated as embodied in a machine for beveling vthe edge of a button- A pistol holster is commonly made of heavy leather and is provided'with a closure [in the form of a iap which is integral with one wall of the holster and maybe bent over the butt of the'pistol andwfastened to the outside of the opposite wall. The fastening mechanism commonly comprises a headed stud riveted or otherwise fastened to one wall of the holster and a buttonhole formed in the free end of the iap. Owing to the heavy leather of the flap, it 'is difficult to push the buttonhole over the stud and to pull it therefrom; and to overcome this difficultyit hasbeen vcustomary to relieve the buttonhole by beveling the eye and slit thereof bymeans of a hand knife. This operation is slow and inaccurate; and the general object of this invention is to provide a machine -for accomplishing this and similar operations.

- According to one feature of the invention, two cutters are provided,l one vshaped to bevel the eyeand the other `shaped to bevel the slit of the buttonhole; `and located beneath the cutters lis a supportfor a piece of work having a buttonhole therein, provision being made for causing relative movement [of approach between the cutters andy the support.' In lthe illusrative machine an end milling cutter having a face shaped to bevel the eye of the buttonhole and a second milling cutter having `a face shaped to bevel the slit of thefbuttonhole are mounted adjacentueach other above a -common work support which is normally spaced from the cutters but may be ,raised by depressing a treadle. The cutters are rotated continuously,` and the work is presented first to one and then tothe other'v cutter. With such a i 1919. Serial No. 284,148.

machine the edge of the buttonhole may be beveled with extreme accuracy and much more rapidly than has hitherto been possible. i

This and other features of the invention, including certain details of construction and combinations of parts, will be described as embodied in an illustrative machine and pointed out in the appended claims. i Referring now to theaccompanying draw- 1ngs,.-

Fig. 1 yis a perspective of a machine in which the present invention` is embodied;

Fig. 2 is a` detail principally in section showingthe means for raising the table or work support;

Fig. 3 is a detail in section showing the manner in which the slit is beveled;

Fig. 4 is a similar detail showing the beveling of the eye, and'y Fig. 5 'isa perspective ofa portion of a piece of work which has been operated upon y by the machine;

The worksupport'or table comprisesv a main portion? and an auxiliary portion 9 which is adjustably mounted on the main portion by means of a screw ,'11 which is threaded into a socket formed in a boss on the underside ofthe main portion 7. The upper end of this screw engages thelower end ofV a pin 13 the upper end of whichcarries the adjustable portion 9. By referring to Fig. 1 it will be seen that the upper surfaces of the portions 7- and 9 are horizontal and that the relative positions of the two surfaces may be varied by manipulating the screw 1l. Rotatable in yvertical bearings in a bracket 15^is an upright shaft 17 having at its uppery end apulley 19 and at its lower end an end` millingcutter 21. This cutter has a conical cutting face shaped to bevelV face is shaped tobevel the edges of the slit 200 of the buttonholeto produce the effect illustrated in Fig-...5.) In order vto position and hold the iiap of the holster properly beneath this cutter with the slit in the plane ot rotation of the cutter, there are provided a back gage 31, side gages 33, anda pair of spring lingers 35 which are astened'by screws 37 to the bac-lr gage. The baclr gage 31 has a slotted extension located beneath the table, as shown in Fig. 3. Extending through this slot is a guide pin 39 and a cap screw l1. rfogether these members serve to guide the gage While it is being adjusted; and the cap screv.7 .-serves also to hold the in adjusted position. The side gages are held in position by screws. 43.

The Worlr support 7 is carried at thenpper end of a headed rod i5 which, isslidably keyed in a bore in an upright boss 17. A coiled spring49, which rests upon a collar 51 fast to the rod and bears at its upper end against a shoulder, serves to maintain the table normally in the lowered position shown. One end of a lever 53 pivoted at 55 to a lug on the frame of themachine, extends beneath the rod 45,- the other end ot the lever having pivoted to it a treadle-rod 57. Depression of a-treadle (not shown), which is attached to the lower end of the rod, thus serves to raise the .Work support to an extent ldetermined by an adjustable stop screw 59. v

1n thev operation of the machine, power isA applied to the shafts of the vcutters in any suitable manner, as for example-by the belts G1 and 63, to rotate them lcontinuously.

The 'flap of the holster having the buttonhole cut in it is placed upon the portion 9 of the Work table Aand the treadle manipulated to raise the table. At the same time the operator manipulates the Work so as to cause the pilot 23 to enter the eye ot the buttonhole. .The effect of this is to center the cutter 21 with respect to the eye and to bevel the edge of the eye as shown in Fig. 41;. The treadle is then released yand the flap ofthe holster placed upon the portion 47, being'properly positioned by contact ofits edge with the back gage 31 and the side gages33. The table is then raised to bevel the edges of the slot after which the table is lowered. 1n Fig. 3 the *vvork'is shown in place after thelovvering of the table, the outline ot the cutter 29 being indicated in dot and dash. The vertical adjustment of the portion 9 of the work support with respect to the portion 7 permits `the relative heights of thetWo portions to be varied so as to provide Jfor unequal Wear of the cutters due to grinding as Well as to ensure that the Worlr maybe properly presented to them. The set screw 59 limits the height to which the Whole Work supportmaybe raised, one function being to take care of Work ot different thicknesses, and another to control the extent of the bevel. i

Having thus described my invention,-vvhat l claim as new and desire to secure by Letters Patentof the United States is:

1. A machine or the class described, having in combination, a support for a piece of Work having a buttonhole therein, a cutter located above one portion of the support and shaped to bevel the edge of the eye of the `buttonhole a second cutter located above an guides for locating the slit of: the button-- hole beneath the second cutter, and means for raising the supportH toward the cutters.

3. A machine of the class described, having incombination, a support for apiece of Work having a buttonhole therein, said support comprising a main portion and a portion adjustable with respect to the main portion, a conical end milling cutter located above one portion, a pilot adaptedto center the cutter With respect to the eye of the buttonhole, a second cutter located above the other portion and shaped to bevel the edges of the slit of the buttonhole, and treadle- Vcontrolled means for raising the support.

et. yAA machine of the class described, havi ing in "combination, a frame, a spindle slidable in the frame and carrying a support tor a piece of Work having a buttonhole therein, a rotary' cutter for beveling the edgeofthe eye of the buttonhole, a guide for centering the cutter With respectto the eye, a lever directly engaging the end of the spindle for moving the support toward the cutter and meansv engaging thelever kfor variably limiting the extent ot: the movey ment to provide for pieces of 'Work of different thicknesses. l

5. A machine of the class described, having in combination, a support tor a piece of Work having a buttonhole therein, a rotary end milling cutter having a conical cutting face, a guide lor centering the cutter in the eye of the buttonhole, a spring for normally retaining the support in a Work receiving position, `and means lfor-` causing movement of the support toward the cutter against the tension ot the spring. Y

` '6. A machine of the class described, having in combination, a Support fora pistol holster iiap having a buttonhole therein,`

an end milling cutter, for beveling the edge ofthe buttonhole, and means for moving vther support toward the cutter variable distances to vary the Width ofthe bevel.

7. A machine of the class described, having in combination, a support for a pistol holster flap having a buttonhole therein, an end milling cutter, guide for centering the cutter with respect to the eye of the buttonliole, means for raising the support to cause the cutter to bevel the edge of the eye, and adjustable means independent of the centering guide for predetermining the height to which the support is raised so as to varyV the width of the bevel.

8. Armachine of the class described, having, in combination, a support for a pistol holster flap having a buttonhole therein, a

flap milling cutter shaped tobevel the slit ing in combination, a support for a `pistol and means Jfor causing relative movement oi'l approach between the cutter and the support.

l0. A machine of the class described, having in combination, a support for a piece ot Work, said support comprising a main portion and an auxiliary portion, a rotary cutter located above the main portion, a second cutter located abo-ve the auxiliary portion, and means tor varying the position of the auxiliary portion With reference to the main portion to provide for unequal Wear of the cutters due to grinding.

ln testimony Whereo'lhave signed my' name to this specification.

VILLIAM J. BRENNAN. 

